Here are five hypothetical or lesser-known native languages that are not widely documented or recognized:
1. Yuchi – An indigenous language once spoken by the Yuchi people in the southeastern United States, with very limited remaining speakers. The Native American tribe based in Oklahoma. The Yuchi lived in the eastern Tennessee River valley.
2. Kaurna – After being on the verge of extinction, the Kaurna language of South Australia underwent language revival attempts. The Adelaide Plains, which stretch from Cape Jervis to Crystal Brook, are part of Kaurna Country. It is bordered to the east by the Mount Lofty Ranges and to the west by the Gulf St Vincent.
3. Nǁng – Nǁng (Nǀuu) is a click language spoken by a very small number of people in South Africa. It is a moribund Tuu language, meaning it is no longer spoken on a daily basis, and only one speaker of the Nǀuu dialect (the name of its only spoken dialect) remains.
4. Ainu – Mainly spoken by the Ainu people in northern Japan, especially in Hokkaido, the Ainu language is an endangered indigenous language. There is no known genealogical connection between it and any other language, making it a language isolate.
5. Taa (or !Xóõ) – Taa, also called ƃXóõ, is a Tuu language spoken in Namibia and Botswana. It is distinguished by having a significant number of phonemes—possibly the most in the world. One census found that 82% of fundamental vocabulary items began with a click, making it noteworthy for possibly having the highest functional load of click consonants.